Hitachi ZW 120-6 Operator's Manual page 231

Section
Replace Fuel Pre-Filter Element
Replace Drive Belt
Replace Automatic Tensioner
Engine Check and Replace EGR Device
Clean EGR Cooler
Check Turbocharger
Check and Clean Injector Nozzle
Check Transmission Oil Level
Transmission
Replace Transmission Oil Filter Cartridge
& Torque
Change Transmission Oil
Converter
Clean Transmission Strainer
Check Tire for Damage
Greasing (Axle support pins)
Check Tire (Tire Pressure)
Check Wheel Bolt Torque
Greasing (Propeller Shaft Center
Support)
Check Surroundings Around Axle and
Covers for Oil Leaks
Axle system
Greasing (Center Propeller Shaft Spline)
Change Axle Oil
Retighten Front Axle and Rear Axle
Support Mounting Bolts
Greasing (Front Propeller Shaft)
Greasing (Center Propeller Shaft)
Greasing (Rear Propeller Shaft)
Check Play Amount in Steering Wheel
Stroke
Steering
system
Greasing (Steering Cylinder)
f
NOTE:
 *1 Add grease daily during first 50 hours of operation.
In case the machine is engaged in excavation in mud, water or snow, add grease after each work shift.
 *2 After 50 hours of operation, carry out next greasing at the first 250 hours of operation.
Then, carry out greasing every 500 hours of operation afterwards.
Shorten greasing intervals when the machine is operated under severe conditions or when the machine is continuously
operated for a long period of time.
 *3 Shorten maintenance intervals when the machine is operated under severe conditions or when the machine is
continuously operated for a long period of time.
MAINTENANCE
Item for check
: First time replacement or cleaning only
Operating hours
10 50 100 250 500 1000 2000 3000 4500
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*1 *2
7-13
Page
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7-68
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7-102
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7-31
7-34
 7-32
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7-83
7-24
7-83
7-84
 7-24
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*3
7-36
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 7-24
*3
7-25
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*3
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*3
7-97
7-22
7-23